Are there any checks for cheating, or is the game based on trust?

After trolling through https://getsatisfaction.com/drawsomething and http://forums.omgpop.com/draw-something there are no Official Rules published by OMGPOP.

So, I believe at the time of this post, there are no implementations to mitigate cheating other than the player opting to only draw. Also, there should now be a delete button in the new update, download it and you should be able to delete the games with cheaters.

However I came across this from one of the employees:

EMPLOYEE Joseph (Official Rep) 1 month ago

Hey David,

Word writing is technically cheating. You should refrain from writing words as much as possible. Try your best to draw out the word without words, it'll be more fun that way :D

Bests Joe

There aren't any check on this, to the best of my knowledge. I often write notes to my opponent before drawing the word. Particularly if I had a hard time guessing or their drawing was funny. I have quit games with several random people for just writing the letters out. Kind of defeats the purpose.

It is annoying and there are no checks. I am not sure that adding optical character recognition would be worthwhile as it wouldn't even get close to 100%.

The best check on this behavior is that it's actually not that quick of a way to farm coins anyway. Since everything is so expensive, the quicker way would be to play yourself using Facebook and an email account on your phone.