"GearScore" as an addon does not ruin pugs. Donations does.
When I played WoTLK on retail, you could EASILY get into icc10 pug with 4,8k gs. Leader asked you about some tactics and if you knew them, you were ready to go. When you had like 5,6+ gs, you were respected and treated well, since that meant you were some experienced raider. But hey, welcome to warmane! You see some 6,5k guy, fully HC geared, even gemmed and enchantet (let's assume). What you get is 12 year old who has no idea how to play but he got some money for christmas. So you're getting a dude, who could do 16k dps on icc, but he does 6k. The same 6k that some good player could do with his 5k gs. But no...
So yeah... I've made a priest here, got him up to 5,2k gs and I realized, that I can't even go to any raid. So basically, i should spend next half year farming 2 frosts/day to buy whole gear and then I would be able to go for some icc10... OH WAIT! I FORGOT... I STILL WON'T BE ABLE, CAUSE FOR ICC10 THEY REQUIRE ICC25 HC ACHIEVEMENT... Sorry...
...so basically I switched to pvp.
Thanks Warmane Community