First point, he hasn't "removed his address from the Parliamentary website", he's actually had to disable the address.
He says he'll re-enable it when the website he's complaining about remove it from a drop-down list they have on a form - people with too much time on their hands pick an issue from one drop-down, pick an MP from another, type in their name and postcode and hit "send", which means that for every "real" email he gets from someone who is capable of writing down their own complaint or issue he has to plough through 200-odd auto-generated from this site. (Figures are ballpark - I wasn't listening *that* closely...)
It's the "campaigning" equivalent of SPAM marketing, just as annoying and with a law of diminishing returns. He told the guy running the site on PM (UK news show) yesterday that he had no problem with them publishing his address on their site and asking people to get in touch if they had a problem, he just objects to the automated system that encourages bored people to nag an MP about "something".