They're wasting their own time. Avoid the sniper lanes and rush them. Especially if their primaries are scouts. No way to hard scope all possible paths at once. And if they find a way to cover most of them, then they're isolated giving an easy 2 or 3 v 1 if you rush. Snipers are the meta because a few people said shotguns are bad now and the lemmings followed. Destiny maps aren't sniper friendly. Very few long lines of sight with tons of cover and CQC only lanes. Idea team balance is at least one rusher load out and 1 sniper load out. The rusher can also be good for counter rush to defend the snipers, and the snipers can be over watch for the rusher. Just remember you don't have to snipe just because the enemy snipes. Find what you're good at and learn of to counter other play styles with it.