I didn’t even know they existed until now. From what I just researched they’re essentially Lemon grenades, not sure if they’re actually legit or just a meme but judging it realistically and looking at lemons flammable properties I’d say it’s legit.

As for my viewpoint on them, well:

My moral view on it as a Lemon myself should mean I’d say don’t do it but lemons grow back and are renewed nor are they conscious, plus I’m a man turned into a lemon. In other words I don’t really care.

From a outside viewpoint and in terms of ballistic potential, I’d say it’s pretty weird and not very effective, surely a grenade would be easier to provide to people fighting in wars and such rather then having to make fragile lemons that explode. Plus it’s just weird, use a normal grenade not a damn lemon.

To sum it up, I don’t really know nor do I want to know, from what I do though I’d say ‘what the hell?’.