Before I torched it though I tried a little experiment. I left my tech skills in place, but also added things like "Blacksmithing" and "Former POTUS" as my skill set. I also said "Do not contact me" and "I hate recruiters" and something along the lines of "if you contact me, you clearly didn't read my profile" - the spam seemed to increase for a while before I finally deleted the profile completely.
Except for the use of the term "fortnight". :)
We ran some back-of-the-envelope numbers last week at the office. Wolfram provided us with a ballpark figure that there are about 70k "IT industry professionals" in London region. Of this, 10-15% (so maybe 12k) are the good ones, and absolutely everybody is fighting for them.
There are more than 10k tech industry companies in London alone. [0]
Competition for talent is fierce, to say the least - and every single startup I know of is hiring. Us included.
0: http://www.wired.co.uk/news/archive/2015-06/10/tech-city-uk-... (24% of 47k)