Where the official grammar is quiet, we aught to tread carefully.
- community constructions used once by one person, don't make a trend
- if the entire community makes a mistake, it isn't a mistake anymore, it is the rule
- innovations that closely follow existing patterns are probably safe (e.g. poka is a bare preposition by the classic word list, but we have another pattern that says locational preps should be prefixed by lon, eg. lon anpa, lon supa, lon sike, so to continue the pattern, it should be lon poka regardless to what the classic word list says)
- innovations that are more avant garde, are only right to the extend that it sounds right and people copy it.
li lon X e Y is avant garde, imho, I'd have to see more people use it (hopefully un-self consciously!) before I'd really trust it.