A builder who joined a pro-hunting demonstration outside Parliament swore and spat at police who tried to move him on, a court heard.
Brett Parsons admitted threatening behaviour and obstructing the highway
and was ordered to carry out 75 hours' community work and fined £75.
The 31-year-old, from Glastonbury, was also told to pay £50 towards costs, after the protest on 15 September.
Parsons left Tower Bridge Magistrates' Court in London without commenting.
Mr Parsons was among 17 people arrested during the protest in
Wendy Miles, prosecuting, said: "Police were instructed to remove the protesters, they asked the defendant and the protesters to move, and they refused to do so."
District Judge Shamoon Somjee told him: "For the threatening behaviour,
because you've not been in trouble before I'm going to make a community
punishment order, otherwise the outcome today might have been very different."