The petition was written out of speculation that there wasn't going to be any continuation of the Jedi Knight series, which I think we would all agree on would make us unhappy. Does it really matter how its written, if in the end the number of signatures is the real point that's being proven? Yeah, people might chuckle at the way the petition is written, but if they see that countless people adored previous games in the series and want it to be continued, then what difference does it make?
If you want the continuation of the series, sign it. If not, don't. Chuckle all you want, but at least make your voice heard.