How should one pronounce the "rofl" in "roflstomp" or "roflcopter"?

ROFL (pronounced /ˈroʊfəl/ or /ˈrɒfəl/):

Teenagers now sometimes use them in spoken communication as well as in written, with ROFL (pronounced /ˈroʊfəl/ or /ˈrɒfəl/) and LOL (pronounced /ˈloʊl/, /ˈlɒl/, or /ˌɛloʊˈɛl/), for example.

Of course, you should avoid using them at all in anything formal. If for some reason you need to discuss them formally, I would say R-O-F-L-copter (spell it out).

Otherwise, think of it as "roffle" (RAW-ful; rhymes with waffle). I've never heard it pronounced otherwise, whether amongst my nerdy friends or in internet videos.

Raw-Full. roflwaffle.

I don't think their status as words is "questionable". I think it's glaringly obvious that they aren't words. Haha.