Huh? There is no Constitutional right to be a lobbyist.
“Peaceably assembling” and “petitioning the government” are still eminently possible for someone who is banned from lobbying.
Those so banned would be prevented from taking meetings with their former coworkers, staff, and superiors as advocates for the industry they used to regulate. And its effectively more a ban on the government workers than a ban on the putative lobbyist himself.
