I'm sure you've all seen posts on here where we advise people against cards/lids/discs etc... and the reasons why. We don't do it for the good of our healths - there is a reason behind it and that reason is because it isn't a real solution, it costs pretty much the same as a mod (a Duo2 is only about £15) and it's too much crap to boot a single disc. In severe cases (such as with the cards) it'll f*** the PS2. What it costs you now may seem cheap, but in the long run you'll only have to mod anyway.
I don't see the logic - people see the warnings, they know the bad things and the downsides and still go with it... I'm very confused people...