Throwing a pie in his face today would get you charged as a terrorist, and you'd spent at least a year in solitary leading up to your trial. The State/Federal Attorneys would somehow turn a simple pie in the face to a dozen charges and try to get the judge to accept 3 of them as felonies.
https://www.yahoo.com/finance/news/bill-gates-melinda-french-officially-185900120.html