On factions server players often water spawers to make them hard to raid, while preventing liquid flow/placement near spawners could be done with plugins, performance usually isn't great, it's been awhile since I've really messed with custom .jars aside from editing a few minor things here and there, but I figured this would be good suggestion.
Something like min-range with 0 resulting in vanilla behavior, 1 blocking liquids 1 block around spawner, 2 in 2 blocks and so on... should also check diagonal blocks, possibly with option to ignore blocks below the spawner (probably not worth the hassle tho).
On factions server players often water spawers to make them hard to raid, while preventing liquid flow/placement near spawners could be done with plugins, performance usually isn't great, it's been awhile since I've really messed with custom .jars aside from editing a few minor things here and there, but I figured this would be good suggestion.
Something like min-range with 0 resulting in vanilla behavior, 1 blocking liquids 1 block around spawner, 2 in 2 blocks and so on... should also check diagonal blocks, possibly with option to ignore blocks below the spawner (probably not worth the hassle tho).