Same goes for (Ranged Only), you get the idea.
EDIT: K, I know it wasn't 100% clear, but I meant that melee only items should be purchasable for melee characters only (or hybrid like 
)
2nd EDIT: maybe blocking the entire purchase is and over-do, but at least give a warning, something like "there's a 
right close to me Quinn, why are you buying 
?)
There are no melee only or ranged only items though, only items with 1 particular effect that you need to be melee to activate, or a split-ranged attack you need to be ranged to utilize.
Similar to AP items on champions with no AP ratios or mana items on champions without mana, there are plenty of edge cases where a particular item is still useful on a given champion despite their incapability to utalize everything it offers.
Also - LoL is a game that lets you take any champion into any lane, build any item, use any mastery set up, and use any type of runes you want. You can get %crit damage masteries and runes on a champion without crit chance, you can build full AP on the ~8 champions with no AP ratios, you can build mana-intensive items on the ~18 champions with no mana. With that in mind - I don't see why you'd lock certain items from certain champions.
they dont work with melee if they are ranged only and vice versa? if some melee buys 
and isnt jayce/elise/kayle/gnar(who are both) then they r obviously trolling so. Or same for 
with ranged buying it
I dont see why not, but it also begs the question as to why it matters in the first place. Care to elaborate?
actually its not a bad idea for two reasons. even with one or two of the features missing, the item can be abusive on some ranged characters. (ive seen an ahri run around with dead mans plate movement speed bonus).
second, clarity.
melee only and ranged only items usually should at least be a lot less cost effective to the point that the opposing champion types dont even want it. so why not lock them out from the item from the start?
gnar needs to get hit anyways. and he doesnt buy hydra. actually, i definitely dont want gnar to get his hands on a movement speed item. so yea. good idea.
