pigeons: friend or foe?

this is a question i've been investigating for a loooong, loooong time. the problem is, you can't ever tell.  one day, they're your friends. and then the next day, they aren't. 

for example, look at this picture: 

is the pigeon on the left giving the other pigeon a kiss on the cheek?  or is he trying to attack the pigeon's jugular? it's hard to tell, right? 


                         just like a pigeon.




yesterday, i saw a pigeon. it was sitting on a ledge right above bp's head. of course bp didn't see it because he doesn't notice things like that (he's not a SPECIAL RESEARCHER like me). i almost didn't see it either, but i snuck out a little to look (don't tell bp) and saw the pigeon. then i pretended i had to pee so bp would move and he did, just in time.  but not before i took a picture of the pigeon:

see what i mean?