I would imagine LE would have to have a warrant to tap someone's internet  transmissions the same as they need a warrant to wire tap a telephone.

Check this article out.

Read the whole article.

A warrant is only needed to search without consent...  it's the hotel's connection, not yours.
The hotel could employ their own IT staff to monitor it...  or even put blocks on it like a library!
Almost laughable when hotels are selling pay-for-view!

It still sounds far fetched, indirect route...  when a simple direct bust is easier.  They call the number in the ad, send an undercover & get him in the room...  BUSTED!
NO hotel would have any choice but to cooperate with LE.    

Yes, I find the d*mn tracking cookies pretty often & I delete them every chance I get.  
skb

that LE would have the technology to pinpoint your laptop, espcially if you are using the hotel's wireless internet access, to your use in your room.

So many other easier ways for them to nab low hanging fruit as has been previously described.