The same could apply surely for any Government petition….are you saying that all petitions should be disregarded in case there are fraudulent signators among them? Should we just scrap petitions altogether?
The petition can't force any action of itself, it merely means that the matter will be considered for debate by our elected representatives in Parliament once there are over 100k signatures; tbh I would be surprised if substantially more than this number are not genuine. There is nothing undemocratic about signing the petition if people wish to do so.
As a side note - I would scrap petitions, I don't think they are the best way for our democratic system to work - we are increasingly seeing people signing stuff because it goes viral, I think that there are far better ways of influencing how our country is run, including actually getting involved in politics, rather than being apathetic and then signing petitions and quoting numbers of signatures to claim some moral high ground / try to change what people should have influenced from the outset...
Actually it doesn't mean that the matter will be debated - the website is very clear on that matter - there is nothing to stop any MP raising the issue and there being a debate, but for a formal debate to happen as a result of the petition, then the petition committee has to decide to put it forward...
As others have said the petition is invalid anyway as it (by its wording) had to be debated and agreed prior to the vote, not retrospectively - you would need a different petition for that...
I am sure there may be more than 100,000 valid votes, but considering 16million remain votes, even 3million valid votes is insignificant - it shows as I have said above, that over 80% of the remain voters accept the decision as the result of our democratic process - whether they wanted it or not personally - therefore as a subset of the country of under 7% of eligible voters why would 3 million petition signers however genuine be enough to overturn a democratically run election where 33million voted? It is headline grabbing figures, but otherwise has no significance...
and I think that those in the remain camp should wake up to the fact that the UK has burned its bridges now - the EU is very unlikely to allow the UK to stay - and if they did it would be on such tough terms as to make 100% of UK voters wish to leave 