Hello spells, this is something that has been a thing on css ever since it came out, we all have been very aware of this as its usually what some players call ''katana'' or ''longsword''
Basically, they do have a bit of advantage ofcourse because of their lags, but you have to realize aswell that It's not as fun for them aswell to be lagging that much when playing. We don't kick players here because of a 100+ ping, however some players that has massive lags and are teleporting around, now I mean huge lags and not just 100ms or a bit more. If they're warping around the map and are basically unhittable, they are interrupting the gameplay where I do believe we have taken action over such things before, but It's very rare. I've been here almost since the start of EH and honestly eventually you will get used to it, but I don't think it would be a good idea to purge them all from the servers, we are trying to open up for everyone to play, that means if they are far away or have a bad connection they should be welcomed to play aswell, as said as long they don't teleport around and disturb the gameplay for everyone else.
These are just my thoughts and some facts I've gathered by being here myself, obviously my answer isn't an conclusion for the situation but I'll just throw this post in here.