Fair warning, someone is able to change usernames, not sure if that's their full capability so keep a lookout for news regarding potential rollbacks again.

Also able to see emails and ip addresses

Does this kind of stuff happen a lot? Is it better for me not starting to play this game? :/

There's been some related security issues (won't specify details), but the developer is aware of them and working hard to make sure that they are fixed. Unfortunately, for someone malicious enough, there can always be a security issue.

I will say that the developer is willing to, and will, rollback the server in extreme cases and will make sure your stuff gets returned in minor ones.

So, in all honesty..... In just playing the game by itself? Very little risk and the game can be fun (and a major content release tomorrow).

In terms of crosstrading and buying/selling using fg? There is some small risk if you trade in a window where there was a rollback.

The fortunate thing is, every time someone does this, the developer fixes another issue and its less likely to happen again.

game is nearly impossible to play at this point...

somebody made several thousand accounts so the game is unplayable for the time being

What does that affect?

this is no longer in effect

it was causing everything to grind to a halt at the time