Hi, I totally agree. My almost 2yr old daughter tries her luck at throwing her food about once every week or so to see if she can get away with it. When she does it I take the meal away and she gets nothing else - if she throws a tantie, time in her room.
This has worked for us, as she wont do it again for quite a while until she decides to see if thats still what happens.
Also, maybe try putting a large plastic sheet under the highchair to catch all the messy bits.
Jaida (6), Ameli (2) & Lacey (2mths) - SA