isPost isGet Security questions

Is it best to secure the actions with

if ( $this->RequestHandler->isGet() or $this->RequestHandler->isPost() implementation  when dealing with forms? Using Ajax in my application so the Security component checking for form modification is of no use to me.

 

And if using $this->RequestHandler->isGet() / isPost () are there any drawbacks / alternative approaches?

 

Thanks,

 

Dave