Drinks machine

When I got back from holiday a few weeks ago the biggest change was that there was a new coffee machine. I was amazed to get this e-mail today:

"It has been brought to our attention from the Klix Vending Engineer that
some of our machines are being written on in permanent marker pen.Please do not
deface the Vending machines in any way as they are on lease and do not belong to
the company.If any machines are vandalised i.e. written on, the
company will incur a cost to replace the affected areas/parts

Thank you for your co-operation"