A sticker the size of a postage stamp is one thing, but that is not a reg plate that one can track on the road while someone is cycling.And it is very easily done. A sticker with 5 digits and a letter combination could be place anywhere on the bike.
This nonsense about about no other country doing that this is not excuse, no other country had an indoor smoking ban before us either.
At the end of the day, one just needs to look at countries that have the greatest take-up in cycling. The standouts are of course the Dutch and Danes, but many other countries leave Ireland for dead on this issue.
What they all DONT have are stupid little laws to appease some mini Hitlers that one must be insured or registered or taxed or some other Micky mouse bollox like that. You don't encourage activity by making it harder and more inaccessible. Even the resident uneducated fools among us should realise that.