Spawncamping Is a problem, but i think its an almost pure game/map design problem, lets face it. If spawncamping works effectivly to win a map, then theres just something wrong. Sure, you can still claim its "lame" and all that, but on the other hand "staying back to give the other team a chance" isnt really good either, is it? thats the sort of "tactics" you use if you play-fight with someone smaller than you, like kids, you just let them win a bit..
Its not the sort of thing you'd do if youre actually trying to win a war(eh.. game) Maps and game-mode should be designed in such a way that spawncamping doesnt pay or is just too hard or useless to do
In the oh-so excellent game I cant stop talking about, Red Orchestra, there are some maps that are just IMPOSSIBLE to SC on , such as RO_Stanislalovo, where the natural frontline is being constantly moved back and forth, you really need to work as a team to push the enemy backwards, and it just works so great. real frantic, even tho its a very open outdoor map.
Red Orchestra http://www.unrealwarfarex.com/redorchestra/
Best. game. ever.