Honestly I agree with this statement and think it isn't a ridiculous idea to try this out.
In my agreeing vision, Our server is mostly and almost completely vanilla (Guard and staple required plugins don't count when I'm saying this). SafeBuckets let's you place water and lava that are stationary, blocks which are not obtainable vanilla without a valid bug or glitch.
What this does is make floating water/lava a lot more easier, for example you do not have to place ladders/signs below the block to make it floating (same with lava blocks, because of the fact that fire spreading is off. People quite take the advantage that you are able to make this float, like making lava/obsidian checkerboard walls, lava walls, etc. I personally the plugin should be removed, or either not allow taking a advantage on the plugin.
The only problem are for only people who are clumsy are pointed out. You can grief much easily on other people's builds because of the spread, which isn't really a big deal anyway.
As I said this is just my opinion and I can be wrong on some facts I said.