Ah ok - it's not as if it could even be slightly like an actual plate so i suppose that's good!
Try starting with a less positive statement the first word GIVE is a positive statement that may be interpreted as an order. I would always start with PLEASE as you set the tone straight away - PLEASE GIVE ME ROOM or even better THANK YOU FOR PASSING WIDE or words to that effect. Oh and I would bang a smilie on it as well
I tried that but even on a proper sized car plate you can't fit more than about 8 characters on, a proper car plate only has 7 so it's a bit of a struggle, and you can't make the font smaller as all the websites obviously make show plates made to look real or proper number plates that have to abide by legal fonts and things.
I suppose 3ft pls might work but then that's not as obvious as to what it means. Least if it's 2 words it's not exactly hard to work out what it means!
How big are you planning on this being, a proper size number plate. Strikes me as odd and one of those hypnotic things which will draw drivers closer as they a) try to read it and b) examine the oddness of a number plate on a bike.
I was looking at a 12x3 plate, it should be the width of my rack + about 3 inches on each side of it (my rack is 5 inches across). A proper sized car plate is 20 inches which is wider than my rack with full panniers - might be a bit too big. Was just a thought after a conversation, oh the irony if somebody ran me over trying to read the bloody thing...
You could have a hi-viz jacket/vest with a custom text with that on it, or a yellow number plate style bit of plastic with text on it.
As I see two officers have conformed it's okay I guess there's no issue!
Always wear hi-viz at night myself along with my lights. I might get something printed on mine.
I wear a hi-vi too but it doesn't seem to stop people thinking it's OK passing 2 inches away from my handlebars, even during the day. Getting a bit sick of it now for obvious reasons - not even because it's dangerous, just because they think it's OK, and it isn't.