In response to this:
Facebook relationship status – While it may seem ridiculous that not changing your Facebook status to “in a relationship” would be a deal breaker, it actually somewhat makes a lot of sense. Facebook has become a more acceptable form of communication. Therefore, not communicating your relationship makes it seem like he’s either embarrassed about dating you or is hiding it. And both of those are true deal breakers. It’s comparable to going to a party and being introduced as “a friend” instead of “the girlfriend”. Taking your status down – it’s a bit fuzzy because everyone knows if you take down your single status it means you’re in a relationship (duh! if you’re single what other change could happen?). But it’s the same idea. If you didn’t mind people knowing you were single, you shouldn’t care if those same people know you got a girlfriend.
Hiding online activities – yep, I’d be suspicious. Trust does play a major part. But it really comes down to what’s being hidden. If the girl’s paranoid and snooping and finds his hidden porn folder – give the guy a break. Keep in mind that same scenario doesn’t work if the hidden folder is ex-related or new interest related. Hiding’s like cheating – you’re not in trouble until you get caught. So the real question is, if you found out a significant other was hiding something (even if you still didn’t know what it was) – are you just going to brush it off? Or would it bother the crap out of you?
Communication with an ex – my personal opinion is that it depends. In most situations, no problem. But I can definitely see it being a problem in several situations: 1) you have a history of cheating, 2) you’ve had a very on/off relationship with the particular ex, 3) you really don’t trust the ex, 4) the communication starts crossing into any area that would be considered best friend, 5) everyone else thinks it’s a bad idea. It’s mostly about trust. But better safe than sorry – you might as well mention it because you’ll kick yourself if things go south and you just sat there.
Posting inappropriate pictures of you online – I don’t even have to comment on this one.