The definition of CB radio abuse is as follows:

A.) Any sort of spamming. Ex.:
1.) Posting the same thing over and over (in the same channel or over many different channels);
2.) Posting gibberish over and over;
3.) Other things along the lines of 1 & 2.

B.) Any sort of recruiting for another company (including advertising for drivers to join your company and advertising for drivers to buy company stock).
As it says in the rules, CB radio recruitment is not allowed.

C.) Offensive comments
1) Offensive language
2) Word filter evasion
3) Rude or inappropriate comments
4) Linking to offensive content