Yeah, the e-petitions are getting fob off responses; the Government always tries fobbing things off when the message is not what they want to hear. Now if every person who received the fob off responded with an intelligent retort to the PM by email, or better yet in writing it would be harder to ignore.
It is hard to attract the Government's attention, especially when they do not want to listen, harder still to get them to change their minds to bring them in line with the feelings of the people, but that is no excuse not to keep at them. Democracy is not perfect but that is no excuse not to use the tools available to get your message across.
e-Petitions have made it more convenient to make a point. Previously the Government would either not respond to written petitions (because it was impractical) or they would send out a form letter; so being able to email a response has made it easier for them, meaning they are more prone to respond; in turn opening the door for individual responses to their response...
... there are few other legal methods of expressing displeasure with the Government, I would urge those with issues to use it and for the Government to listen.