How do you avoid bumping into players as a spy?

Solution 1:

I think a key thing as spy is to avoid groups completely. If you reduce the chances to bump into someone then it will make life easier.

I think spies work best when they are trying to pick off the people at the back of the lines, whether it's people running from spawn, or engineers or people going back for health. Kill, cloak, hide.

If you're in a situation where, when cloaked, you're trying to get through a group of enemies, either following, or running through the front line to get behind the enemy, then I highly recommend jumping from side to side. Being able to reduce the area of possible contact with an enemy is the key.

When disguised there is a little bit of timing involved, as well as a clear plan. You need to look like you have a definite movement, nothing gives away a spy as someone just running around after another person. If you attack when they are attacking then it's easier to blend in and not look suspicious.

I do my attacks as spy in a forward motion. Cloak, get in behind the lines, disguise, decloak, run forward with the enemy attackers and attack. No matter the result, I push through to my team-mates, heal and resupply. Rinse and repeat. Obviously if your using the cloak and dagger or dead-ringer then it's different.

There is a huge slice of luck involved with tracking and pushing through as a spy as people are a little unpredictable and sometimes you just get unlucky.

Solution 2:

Playing spy on a crowded server is probably the most difficult class to play.

You have to

know perfectly each angle of the map.
know the position of your team members in order to avoid being on the direct line between them and your enemies.
know the play style of each class for that specific map. In particular you have to know the routes of pyro and where is directed spam of soldier and demoman.
follow your instinct. It will became better and better every dozens of hours you play that class.
be lucky. That's really important for a spy. The Murphy's law tells that after each angle, or near the enemy respawn if you encounter an enemy that enemy will be a Pyro, obviously firing without any apparent reason ;)

Solution 3:

Don't get near pyros. They spy-check front, sides and corners, and everything that looks suspicious.
If you need cloak refill, rest at the middle of a wall. Don't curl up in a corner, someone will go there for camping reasons and bump into you.
This may seem weird, at first, but, talk to others: call for medic or say something to the team (in-game voice). This will give you a more credible image, that you belong to the opposing team. It's also a distracting maneouvre: if someone bumps into you, just bring them from the thought that there's a spy among them :)
For the same reason, don't get near engineers. A good engineer does a spy-check with his wrench or the shotgun first, as soon as he sees someone running in his direction, especially when not firing or making a noise.

Solution 4:

I play mostly Spy and I find that playing it is not hard if you make your move quick. The more you linger around the same people, the more suspicious you become. I've had times where there were many people capturing a point. Instead of standing around, I hopped down -- stabbed a couple of people -- and dead ringered out of there. I wouldn't recommend standing amongst a group of people waiting for the perfect opportunity. In fact, the only class that's worth waiting for to do that is Engineer (so you can sap his crap). Make your move quick and get out of there.

Solution 5:

When playing a spy, distractions are your best friend. Don't try to 'blend in' with a crowd, that will inevitably get you killed. Wander towards the back, wait and make sure everyone has passed you by, and then and only then should you decloak and march forward, acting like you're at the back of a charge.

Try not to directly charge at a person's back, which is a dead giveaway that you are a spy. Also be aware that some players will bob and weave if they suspect a spy is nearby. Wait for an ally to distract them with a fight before moving in, so that you know exactly where they'll be going (to fight that person, rather than randomly dodging a spy).