>> What recommended web sites or services are there which are simple to set
>> up and which let the other party SMS me without showing their number?
>>
>> Of course I get lots of Google hits for "free SMS" but ....
>>
>> which sites are recommended for being reliable in sending the SMS
>> without delay and not collecting mobile numbers or adding particularly
>> intrusive text?
>
> Why would you want to receive anonymous texts? ....would you be able
> to reply to them ? .

I think the OP meant -

"What recommended web sites or services are there which are simple to
set up and would let me stalk someone via SMS without showing my
number?"