Is kayle and yi combo bannabe?

Not a moan thread got beat by this combo the other day was impressed how well it worked. Wanted to try it myself to try and get out of my own Elo he'll but my friend seems to think that it's actually bannable as it's a teqnique boosters use? Is this the case id be suprised as surely that would make kog and lulu or zilean and any hyper carry bannable too? Can anyone confirm either way?
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