"It is not a creative way to earn money, they are unsightly, intimidating and the practice is right dangerous."
"Who needs them don't all cars these days come with their own window washers and windscreen blades?" Jason Clendon said.
Another said Ms Murphy was speaking against the rules set by her own council.
The district council's traffic bylaw bans the practice.
Others reiterated concerns that crews washed even when they were told "no".
Ms Murphy said she agreed there were safety issues and councillors had raised these with the NZ Transport Agency.
She also said if there was no demand for the service, they would not be making money and wouldn't bother.
"It's a shame that some people have had a negative experience ... and it's not right if you say you don't want your windscreen washed and they do it anyway," she said.
Her advice to the washers was: "Please respect people if they say no, please don't leave any rubbish behind and please don't wear a hood. But good on you for getting out and working."
And to drivers: "The window washers are people that live in our community, they are part of our community ... Show compassion, patience, trust and respect and you will get it back."
While the practise was banned on council roads by a bylaw, many washers focused on State Highway intersections controlled by the NZ Transport Agency (NZTA).
The NZTA had backed down on plans to install signs discouraging washers, but was looking at creating its own bylaw "a process which takes time", an NZTA spokeswoman said.
"The Transport Agency believes the best way to discourage window washers ... is for motorists not to pay them," she said.
A legislative ban could also be on the horizon, with National MP for Botany Jami-Lee Ross aiming for an amendment to the Land Transport Act which would allow police to issue $150 fines.
If his private members bill got support, it could be law within a year.
Mr Ross said he had been speaking to Whangarei's Matthew Judkins, who started a local petition against the washers which had more than 1600 signatures.