The reason players 'hack' the testing is because they either (a) believe other players are doing the same, or (b) other players are _actually_ doing the same, so it's another variable that has to be taking into consideration if you want to 'be the best'.

Few years ago I heard someone (like doctor or someone related to the field) talking about it, and he said there are 3 conditions for a drugs to be considered as a doping product. The main one being "put the user's health at risk" (another being "enhance performance" and I don't remember the third one).

I don't think you can die using a plugin.

My thoughts exactly. I was a great fan of professional cycling when I was a kid (I still follow it, mostly for the scenery nowadays), so much so that as an Miguel Indurain fan I still remember the 8-man chase in the 1996 Tour de France that saw his reign end (https://www.youtube.com/watch?v=6xsXthk4YIo). Each and every one of those 8 athletes from that legendary chase has been proved as being doped sometimes during their career (and most probably they all were doped during that stage). It has not been proved yet, but it's an open secret that Indurain itself might have been a doper, and even Merckx. This ruined professional cycling for me.

Two years after that 1996 Tour the Festina scandal started and at least cycling did try to make itself clean. The same cannot be said of football, where it's absolutely incredible how players like Messi and Ronaldo can play 60+ matches per year at such a high level, consistently. By "incredible" I mean "more than human".