PCS- in your attempt at humour, you've missed the point. Completely.

LEGO is the name of the company, the product in question is LEGO bricks. Emphasis on 'bricks'. Technically you shouldn't refer to the bricks as LEGO or LEGOs either, the same as "FORDS" should really be "FORD Cars".

If you choose to call the bricks by their trade name, who's to say the collective noun isn't LEGO? It's not as if that's uncommon, or do you go past a field and shout "Look, sheeps"?.

Either way is acceptable, depending on your preference.