The trouble with your argument is that you could call ANYONE influential by your standards. Wow look, this band was the first to do this and they are super old! Metallica was the first to do this and that and omg they r asume! What did they do? Oh yea. They wrote songs with guitars, lyrics, drums, and bass. WOW INFLUENTIAL. You act like they were the first band to do that. In that case, what else did they do? "PEANUT BUTTER SURE GOES GOOD WITH JELLY! OMG THANK U METLAICUXA!"
The way you talk about it, Avril Lavigne is influential because mainstream music these days is going way more punk than it used to be. And it will stay that way for 4 months or so before we have the next big trend.
I'm not the one going around going "Omg this sucks and this sucks and if you don't agree with me YOU suck." I called them overrated and here comes you, Captain happy fanboy, telling me I'm wrong because, for lack of a better reason, YOU say so.
That's the trouble with opinion based topics - we get people like you flaming people like me that don't agree with yourself.
Well have a fun time being a baby in here, I'll be elsewhere.