I think if dogs were allowed into more places where theres currently no legal reason they can't be - shops, cafes, restaurants (yes, its NOT illegal, it breaks NO hygiene or health and safety rules)..
We would have a society more tolerant of dogs and more sociable, safe, friendly dogs.
Tying dogs up outside stores - whoever has said that in a PP - MASSIVELY dangerous, hugely irresponsible, puts the dog AND members of the public at a huge risk.
For the dog itself - at risk of being stolen, abused, accused of biting
For the members of the public - risk of being bitten.
Not worth the risks, please do NOT do it.
Of course it is ENTIRELY up to any business as to whether they want the custom of dog owners or not - I would suggest if you are somewhere you are CONSTANTLY being asked if dogs can come in, maybe reconsider your policy - after all there is NOTHING that says you have to welcome in ALL dogs regardless of their behaviour or how they are managed by their owner!
You can welcome well behaved dogs at your discretion, meaning you can ask owners of badly behaved dogs, dogs coated in mud, or irresponsible acting owners, to bugger off!
As far as dogs being unhygienic, well frankly, they are no less hygienic than people - both can spread parasites, disease and all manner of filth including skin particles, and faecal matter.
So if HYGIENE is your only issue - YABU, and very silly indeed.
If you just don't LIKE dogs well, theres a lot in life I don't like either, suck it up sugar tits, its not the end of the world.
If you have a phobia - then YOU have a problem that YOU need to deal with, not make the rest of the world deal with it for you. I have a phobia about wasps, I don't seek to eradicate them or expect everyone else to deal with them for me!