I belive a cirtain brazilian driver in the 80s/90s going by the name of Senna also had a similar style. Didn't do him any harm
But Senna didnt have as many accidents as Hamilton is currently having.
At present Hamilton seems to be involved in at least 1 incident, every other race.
Canada was a little ridiculous, because he was on the track for only a few laps in that short time he collided with Webber (I think it was) and went off the track trying to overtake MSc. I'm not going to mention the Button crash as I don't believe he was to blame for that one.
It must also be pointed out that every driver/sportsman goes through bad form. The problem with Hamilton is that his bad form seems to be lasting many races and this is the worry.
Also, somebody above stated that Alonso was reckless last year, yet we are singing his praises this year. First off, for me and for many, last year, Alonso was the driver of the season. The reason for this is that he was the highest scoring driver in the 2nd half of the season, in a car which was not the best. Furthermore, he made RBR work very hard to beat him. It was only when they sold him a dummy (to cover Webber) and encouraged him into a bad strategy that they beat him to the title. Otherwise, Alonso would've won the title last year. Also, in the last race of last year, Alonso tried very hard to get passed Petrov. The problem was that the track did not allow overtaking. Alonso was pushing so hard, he even ended up going off the track. But crucially, he did not crash (which is Hamilton's problem, this year).
You also have to consider that although Alonso had an average 1st half of last season, he still absolutely hammered his team-mate into oblivion. This is something that Hamilton has not been able to do.
To compare Alonso in 2010, with Hamilton in 2011, is wrong as there is no comparison.
Personally, I feel that Hamilton has actually gone backwards and is currently not driving as well as he did in 2007/8/9/10. His weakness this year has been his recklessness.