I'm thinking of changing my gamertag (getting complaints about it of course), but I'm not sure what effects it will have on my account, Bungie account, etc. Will anything "bad" happen?
I personally don't think so but I haven't changed my GT but the only effect I guess you could have is confusion with your friends because you changed your GT.
Also, it can mess up any stats sites that you go to, such as halocharts.com or halo junk. But other than that, no hardcore problems will come up for ya.
Well, people won't know who you are. You maps will not show your NEW GT. I changed mine twice, it will be ok in a week I think(it did for me).
Major effects: None Minor Effects: identity Confusion (fixable by a message to all friends) map author confusion (not fixable, but if people remember your old name with your old maps it wont matter)
So many people asked me to do this .. I never bother and they never change in the end .. So good luck with getting enough people and remember to send a message to all your friends list saying you changed your name =]
Nothing major happens (I've had mine changed). Your bungie account is still your old gamertag, but aside from that, you're safe.