assuming we absolutely won't fsmash ya ur right this is very effectiveonline with a tad bad latency snake's very weak against spamming, though offline if you know how to dodge you can get past any spammer ;P
and when I play snake, something that works often when playeras are spamming at the other side of the stage like Pit, is to air dodge untill you get a little bit in front of him, use his new wavedash, works on the most spammers I've met =P