I don't really see a problem with anything the officer did, in fact good for him for not putting up with the critical mass bullshit. The officer witnessed a traffic violation, so he was allowed to lawfully detain the guy.
Florida bicycle law regarding roadway position:
Roadway Position (see Section 316.2065, F.S.)
- A bicyclist who is not traveling at the same speed of other traffic must ride as close as practicable to the right-hand curb or edge of the roadway. A bicyclist may leave the right-most portion of the road in the following situations: when passing, making a left turn, to avoid road hazards, or when a lane is too narrow for a bicycle and a car to share safely.
- A bicyclist operating on a one-way street with two or more traffic lanes may ride as close to the left-hand edge of the roadway as practicable.
- Persons riding bicycles upon a roadway shall not ride more than two abreast except on paths or parts of roadways set aside for the exclusive use of bicycles. Persons riding two abreast shall not impede traffic when traveling at less than the normal speed of traffic at the time and place and under the conditions existing, and shall ride within a single lane.
Cyclists do have the right to the roadway, in fact in some States, if there is a bike lane they must keep to the bike lane. If there isn't a bike lane they must keep as far to the right as possible and not impede or block traffic. A motor vehicle could also get a ticket for impeding or blocking traffic as well.
These cyclist clearly where impeding and blocking traffic so the tickets and lawful detainment was well deserved. They had their own designated bike lane however they all road blocking the traffic lanes. The officer also clearly asked several times for them to move over to the bike lane and stop impeding traffic only to be ignored.