From Mechwarrior Living Legends Wiki
Spawn Camping is possible, but highly discouraged tactic of attacking enemy units within their base. It's generally considered as a tactic against fair play rules.
Spawn Camping usually occurs when one team has a significant disadvantage in amount of players or skill. Sometimes it's an effect of Team Stacking, or the suprise attack of few units at an enemy base. In any case - it's defined by prolonged attack of an enemy base. or units within, often combined with destroying turrets, or sometimes even units entering enemy hangar and hunting Battle Armor in there. Firebombing the enemy base is also considered Spawn Camping due to very high amount of damage given by this weapon and very low chances of defense against it.
Spawn Camping differs though from attacks to units which return back to base for repairs after an engagement - such moves are occasionally considered as acceptable by the community. Spawn Camping also cannot occur in Terrain Control mode, as primary objective of it is to capture the enemy base.
Countering Spawn Camping
The simplest way is simply to ask enemy team for more space using public chat (default key: [Y] ).
Alternatively try to spawn in different base if possible. Some maps without another base contain airfield, so spawning there is another possibility.
It's also possible to simply push back the attackers - for this it's required to pick best possible brawlers and exit the hangar in largest group available, focusing fire on a single target at a time.
Finally, on some servers, mostly these sponsored by Clans or Units, it's possible to ask for admin intervention or collect screenshots of players Spawn Camping and post them on forums of the Unit.
History of Spawn Camping in MWLL
Unlike in the Crysis itself, MWLL was rarely plagued by Spawn Camping. Longer distances between bases made such attempts more difficult, although still it occasionally happens.
Major issues were in version 0.2.0 when newly added Long Tom Artillery Tank could be used for effective bombardment of enemy hangars. Due to the high damage output in this version made it capable of destroying almost any unit in a single shot. In version 0.3.0 the LAMS turrets were introduced, which are capable of taking down the enemy Long Tom projectiles.