Cyber bullying is when someone hits on you or just overreacts with his replies because they're just dickheads. I do believe that even if it's said in an online community we still feel it as it's being said eye to eye. Think about it, it's a community, a lot of guys even donate here (which means they like it and consider this more than just a random website filled with guys whom we don't give a shit about), and at the end yes when someone flames on us for no reason, yea it does bum you out. I remember when I first joined the forum a minion @melody came to me about some kind of "hack library" that I wrote on C++, don't get me wrong she was completely right, I released an utter crap, but the way she told me made me feel extremely bad, I wanted to quit coding at all (and I just started back then). I'm not saying stop trolling or making fun, but just don't cross the line.
Oh and don't be fucking stupid, saying close the browser and so on, it's not cyber bullying if you call someone a ****** or insult their mom, it's when little fuckers try to use the internet to spread out mean stuff about you, like sharing intimate pictures of you or doxing you and releasing private data. In that case it's not so easy to get over it or fix it fucking morons.