I wouldn't be averse to this idea. I don't care who you are on steam - I'm not going to stalk you or trash talk you; literally couldn't care less.
I just want to know whether to take you seriously and if you have any experience to back up your claims, and thus how much weight your opinion is worth.
I'm likely to be more receptive to the opinions of someone who's top 10 1v1 in a thread about 1v1 maps, compared to a rank 5000 who might have a different experience playing games with other rank 5000's.
Basically, this is 1 reason. But been top100 doesn't automatically makes your opinions correct or agreeable (see Quentin

). Same the other way round.
If someone says:
"Panthers OP!" it may be a problem at their skill level and not on others skill level.
Another example. "Just use 2man soviet sniper to counter OH sniper". It may work against people who don't use their sniper properly, but on Luvnest words, it doesn't work as much on high level.
Same with concerns regarding teamgame or 1v1 oriented problems. Or even random vs AT.
It also filters troll account up to some point.