Do I step on and crush them to get in? Or walk an extra 50 feet to use my back door which is an inconvenience?
salt on the steps will prevent them from going there.
Get a spade and remove them. Wear gloves. Do NOT touch them.
Walk 50 feet.. yuck. You can't get snail slime off your shoes easily. Get some slug gone or maybe just some salt, and throw it around evenly so it covers your entire front entrance. Then just clean off what's left of the snails.