The collector was unhurt but "fairly shaken". Mr Large said it was important for her to know she had support. "It would be nice if these young people gave the money back. It would be nice if they got some insight into why this is so wrong. It would be nice to try and help that person?"
The incident was "the exception" for Wanganui, he said.
Double S Motordrome owner Ray Stevens has collected $315 so far to replace the stolen money, pledging $100 himself and receiving another $100 from a farmer. Other donations had come from people who had seen a post on his Facebook page.
"It's a really negative, bad thing that's happened ... people don't like seeing that, people want to help," Mr Stevens said.
He reckoned Wanganui residents were the most generous in the country proportionately.
He will wait to see if anybody else comes in and makes a donation before taking the money to the RSA by Anzac Day.
Anyone with information on the theft should contact Whanganui police on 06 349 0600 or call anonymously Crime Stoppers on 0800 555 111.